People A to Z

Samantha Weintraub

  • PhD 2014 in Ecology and Evolutionary Biology


Terrestrial biogeochemistry, carbon & nutrient cycling, soil development, tropical forests.

Ethan Welty

  • Graduate Student


Tidewater glacier dynamics, geographic information systems (GIS), photography, photogrammetry, computer vision.

James W. C. White

  • Fellow and Director of INSTAAR
  • Professor of Geological Sciences, University of Colorado Boulder


Global change, paleoclimate dynamics, biogeochemistry.

Will Wieder

  • PhD Graduate; former INSTAAR postdoc


Soil biogeochemistry
Earth system modeling
Tropical forest ecology

Mark Williams

  • Fellow of INSTAAR
  • Professor of Geography


Mountain hydrology and biogeochemistry, surface-groundwater interactions, acid mine drainage, glacial hydrology, snow hydrology.

Adam Wlostowski

  • Postdoctoral Scholar


hydrology, surface water - groundwater interactions, hydrologic connectivity, numerical modeling, collection and analysis of long-term data

Chad Wolak

  • Laboratory Manager, Laboratory for AMS Radiocarbon Preparation and Research (NSRL)
  • Professional Research Assistant

Jeffrey Writer

  • INSTAAR Affiliate
  • Hydrologist, USGS
  • Research Associate, CEAE, CU-Boulder


Wildfire impacts on water quality and aquatic ecosystems, coupling of ecological and engineered infrastructure, fate and transport of emerging contaminants.